Question

2x+3y=5 and 7x+9y=3 using graphical method​

Answer 1

Answer:Given, equation;

⚫2x +3y=5--------(1)

⚫7x -9y=-2----- (2)

From equation (1), we get;

➨2x +3y= 5

➨2x= 5-3y

➨x= 5-3y/2---(3)

Therefore,

Putting the value of x in equation (2), we get;

Eliminate the value of y in equation (3)* we get;

Now,

The value of 12x+15y,

➨ 12(1) + 15(1)

➨ 12 + 15

➨ 27